betts



(NoModeL) 2 Sheets-Sheet 1.

L. P. BETTS. TUBULAR LANTERN.

No. 379,304. Patented Mar; 13, 1888.

(No Model.) 2 SheetsShet 2.-

L. P. BETT'S.

TUBULAR LANTERN. No. 379,304. Patented Mar. 1-3, 1888.

UNITED STATES PATENT Orricn.

LEWIS F. BETTS, OF NEW YORK, N. Y., ASSIGNOR TO ROSA M. BETTS, OF SAMEPLACE.

LANTERN.

SPECIFICATION forming part of Letters Patent No. 379,304, dated March13, 1888.

Application filed February 12, 1887. Serial No. 227,370. (No model.)

To aZZ whom it may concern:

Be it known that I, Lnwrs F. BETTs, of New York city, county and Stateof New York, have invented certain new and useful Improvements inTubular Lanterns, of which the following is a full, clear, and exactdescription, reference being bad to the accompanying drawings, and tothe letters of reference marked thereon.

My invention has relation to that class of lanterns or illuminatingdevices wherein air for the support of combustion is conducted down tothe under side of the burner-cone from a point or points in the regionof the outlet for products of combustion through suitable tubes providedfor the purpose, which class is now commonly known as tubular lanterns,tubular lamps, &c.

The principal objects of my invention are to simplify and improve thegeneral construction 7 of the lantern or lamp; to make the tubes each ofa single piece of metal and angular in cross section, whereby they maybe easily and quickly made and securely mounted in place, requiring verylittle solder and being more rigid and durable than the round forms; tosimplify the globe lifting and holding attachments or accessories,rendering them convenient, accurate, and durable; to provide simple andefficient means for guiding the globe to its seat, for securing theperforated bottom, burner, and cone against accidental disarrange; ment,and for mounting the bail in connection with the tubes, and to secureother advantages in the matter of construction and arrangement, as willappear from the following explanations. To accomplish all of this myimprovements involve certain new and useful arrange ments orcombinations of parts and details of construction, as will be hereinfirst fully described, and then pointed out in the claims.

In the accompanying drawings,forming part of this specification, Figurel is an elevation of a tubular lantern constructed and arranged foroperation in accordance with my invention and embodying my improvements,the globe being shown in its closed and locked position resting upon theperforated bottom, as when the lantern is burning. Fig. 2 is anelevation, partly in section, showing the globe elevated to give accessto the burner for lighting, ex-

tinguishing, trimming, &c., a fragment being broken out of each tube, soas to show its angular form. Fig. 3is a horizontal sectional view upon aplane passing through the upper globe-holder and tubes, showing theglobe holding spring in plan. Fig. 4 is a plan view of the perforatedglobe-bottom detached. Fig. 5 is a plan View showing the general formofthe blank from which each tube is made in accordance with my invention;Fig. 6, acrosssection showing the sides and marginal flanges bent andready to receive a mandrel; Fig. 7, a similar view showing the mandrelin place and the flanges pinched together, and Fig. 8 a crosssectionshowing the flanges turned one upon the other and locked. Fig. 9 isaside view of the tube before the branches are bent and soldered inplace. Fig. 10 is a plan of the blank from which the angular centralpipe may be formed, and Fig. 11 is a view in perspective of thecompleted central pipe detached from the other parts.

In all the figures like letters of reference, wherever they occur,indicate corresponding parts.

A is the globe or flame-protector; B B, the air-conducting tubes; 0, theoil-pot; D, the dome; E, the central air-pipe through which air isdelivered to the tubes, and F the bail or handle.

According to my invention I make the side tubes each of one piece ofmetal and square (or substantially square) in cross-section,proceedingas follows: I take flat strips of tin or other metal of proper lengthand width and cut or trim or stamp these, as shown in Fig. 5, to formthe blanks, which are afterward to be bent along the dotted lines,suitable machinery or implements being employed for the purpose. At onestage the parts assume the formshown in Fig. 6, the two flanges c and I)being of unequal widths, so that one may double over the other to formthe look. A mandrel is then in serted, as at c, Fig. 7, and those partsabove the dotted line in Fig. '6 brought to the position shown in Fig.7, the two flanges touching each other,and pinched firmly together byany suitable tools, as at d d, after which they (the flanges) are beadedor locked or bent, as shown in Fig. 8, and the mandrel withdrawn. Thetube thus made is then of the form shown in Fig. 9, the end portionsready to be bent at suitable angles with the middle or main part, so asto take the form and position indicated in Figs. 1 and 2. That the seamor joint may not interfere with the proper bending and looating of theparts, the blank, Fig. 5, is cut away, as at e e, which leaves the seam,when finished,with inclined ends, asin Fig. 9, which may abut againsteach other after the parts are bent to final position. Air for the sup'port of combustion travels downwardlyin the tubes, and, that thecurrents may not be interfered with, the rounded port-ions ff are madeto lap over the outside of the portions 9 g. The ends of the tube,beingbent to final location, require only to be soldered at the angles, whichsoldering may be easily and quickly done, the joints being flat.

The blank from which the central air-pipe is made is shown at Fig. 10.This being bent to the form indicated in Fig. 11, the parts h t and is Zare secured by soldering and the central pipe is completed. It should bea trifle greater in cross-section than the two side tubes together, soas to insure an abundant supply of air to them.

The ends of the side pipes are secured in the top of the centralair-pipe, as indicated in Fig. 2, thejoints being all plain or fiat, andconsequently easily and quickly made and strong and durable, as will bereadily seen.

The dome D is movable up and down upon the central air-pipe and carrieswith it a metallic globe-ring, G, to which the globe is removablyconnected by a spring, H. This spring H is mounted in ring G, as by aloop, m, passing through the ring and soldered upon the exterior, andhas two finger-pieces, as n n, projecting through a slot in the oppositeside of the ring. The two portions of the spring enter the neck 0 of theglobe, being suitably bent for that purpose, and when they are in placeconnect the globe with the ring, so that it must move with it. To detachthe globe the spring has only to be compressed.

It is desirable to elevate the globe at times, so as to gain access tothe burner. Heretofore globe-lifters have been connected with theperforated bottom plate, requiring guides for the long wires to beconnected with the side tubes and preventing the detachment or removalof the globe except when in a certain position. According to myimproven'fent I employ a spring lift-wire, K, passing through the uppersections of the air-tubes and connected with the top or dome, D. Thedome being guided upon the central air-pipe and each branch of theliftwire at two points in the tube through which it passes, no furtheror extra guiding arrangementis required.

The globe is elevated or depressed by simply moving the lift-wire.X'Vhen down to its final position, as in Fig. 1, the upper bent portionsof the wire spring very slightly beneath the margins of the upperorifices in the air-tubes, thus holding the globe firmly to its seat andrequiring no other lock or catch for this purose. p The perforatedbottom plate for the globe is represented at L. This fits over theburnercone and admits air to the exterior of the flame. To guide thebottom of the globe accurately to its final position (after beingelevated) and to prevent disarrangement of the bottom plate, the centralportion of this plate is considerably elevated, and upon the face ofthis elevated part I provide any number of plain ridges, as at p p.

To secure the burner and cone against accidental disarrangement, as whennot held in place by the globe, and to likewise secure the bottom plate,I lock the bottom plate in place and rely upon this to hold the burnerand cone. Upon the bottom plate I secure two wires or strips, as at q q,projecting downwardly to a point below the tops of the lower parts ofthe aintubes. These parts of the air-tubes are perforated, as atr r, andreceive the lower ends of the pieces 4 q. The pieces q q fall onopposite sides of the air-tubes, and the arrangement is such that byturning the plate a trifle the wires will be disengaged from theair-tubes and the top plate may be easily removed to be afterward aseasily replaced and looked, as will be readily understood.

lVith the round-tube lanterns separate appliances have been foundnecessary for connecting the bail with the air-tubes. Under myconstruction I simply perforate the tubes, as at s, and indent them, asat t t t. The ends of the bail are then slipped in place, as bestindicatedin Fig. 2, and the union between the parts is all that may bedesired. The perforations in no way interfere with the joints at theangles, and no soldering or separate pleces are required.

Being constructed substantially as above explained, the improved lanternis found in practice to fulfill all the purposes or objects of theinvention previously stated.

I make no claim herein to any method of making the side tubes, nor yetto the side tubes considered independently of other parts, thesefeatures forming subjects of separate applications for patent filedFebruary 17, 1888, Serial Nos. 264,391 and 264,392.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is

l. The combination,with a tubular lantern, of the angular air-tubes,each having substantially vertical and horizontal portions, the centralair-pipe joined with said tubes, and the fiat-topped oil-pot, the lowerhorizontal portions of the tubes bearing upon the oil-pot and securedthereon, and the seams being located on the inner faces of the tubes,substantially in the manner and for the purposes set forth.

2. The combination, with a tubularlantern, of the adjustable dome, theglobe-ring secured thereto, and the globe-holding spring connecting theglobe and ring, substantially as shown and described.

3. The combination, with a tubular lantern, of the air-tubes, the dome,the globe, and the spring lift-wire passing through the air-tubes andconnected with the dome, said Wire being bent and arranged toautomatically lock the globe down by bearing upon the under surfaces ofthe upper faces of the airtubes, through which the bent portions ofthespring project, substantially as shown and described.

4. The combination, with a tubular lantern, of the perforatedglobe-bottom, burner-cone, depending wires or strips, and the perforatedair-tubes, the globe-bottom resting upon the burner-cone and the wiresor strips connected with said bottom and arranged to enter theperforations in the air-tubes for the purpose of locking the parts,substantially as shown and described.

5. In a tubular lantern, the combination, with the air-tubes providedwith perforations and indentations, as shown, of the bail the ends ofwhich enter said perforations in the tubes and rest in saidindentations, substantially as shown and described.

In testimony that I claim the foregoingI have hereunto set my hand inthe presence of two witnesses.

LEWIS F. BETTS.

